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A navigation map of the Anambas Islands in the South China Sea, including shoals and reefs, bathymetry (sea depth), anchor points, current and tide information, and two elevation views of the coasts. Obstructions in the water are marked with letters.

Navigation map of the northwest coast of Sumatra. Bathymetry (sea depth), anchor points, shoals and other obstructions (clay, coral, mud, stones, sand) are marked, with hills and settlements to use as landmarks.

Navigation map of the west coast of Celebes (Sulawesi), north of Makassar. Bathymetry (sea depth), shoals and other obstructions are marked, with hills and settlements as landmarks, and elevations (side views of hills) to aid navigation.

Navigation map of the west coast of Celebes (Sulawesi), north of Makassar. Bathymetry (sea depth), lighthouses, shoals and other obstructions are marked, with trees and hills as landmarks, and elevations (side views of hills) to aid navigation.

Navigation map of the west coast of Celebes (Sulawesi), north of Makassar. Bathymetry (sea depth), shoals and other obstructions are marked, with hills and settlements as landmarks, and elevations (side views of hills) to aid navigation.

Eleven separate maps of bays and river mouths of Sumatra, including two bays on the island on Bras (Breueh Island), and the bay at Kota Radja (Banda Aceh). Bathymetry (sea depth), anchor points, reefs and shoals are marked, along with tide data.

A map to aid navigation in Ambon Bay, on the island of Ambon in the Maluku Islands: bathymetry (sea depth) and mountains are shown along the coasts, with inset maps of a coal mine pier and Fort Victoria. A second map updates the coal mine pier map.

Navigation map of the Riau Strait between Batam, Bintan and Rempang (Riau Archipelago). Bathymetry (sea depth), lighthouses, bouys, currents and obstructions are marked. There are side views of islands and mountains (elevations) to use as landmarks.

Map of Koninginne Baai (Bayur Bay, west coast of Sumatra) used to navigate Emma Haven (now Port of Teluk Bayur). It features bathymetry (sea depth), reefs and shoals, as well as lighthouses, buoys and two elevations (side views) of coastal mountains.

A navigation map of the northern tip of Sumatra, featuring bathymetry (sea depth), reefs, shoals, and side views of landmark mountains (elevations). Lighthouses are highlighted in red and yellow, with lines to indicate the limits of their range.

Map of an expedition route—in red—through the country of the Batak people of northern Sumatra, from Lake Toba to Loemban-Pinasa (Lumban Pinasa) and Djandji. Mountains and forests are shown, along with two drawings of views of hills.

Included in a book chapter describing the northern peninsula of Halmahera, this map focuses on the coasts and nearby islands, with the interior left mostly blank. There are seven elevation views of mountains, and two inset maps.